Miscellaneous Genera V.
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Pleurona falcata Walker
Pleurona falcata Walker, 1866, List Specimens lepid. Insects Colln Br. Mus., 35: 1564.
Pleurona simillima Swinhoe, 1917, Ann. Mag. nat. Hist. (8), 20: 161, syn. n.


Pleurona falcata

Diagnosis. The wings are a medium to dark reddish brown, fasciated darker. They grade distinctly darker still and more purple in tint towards the distal margins. The forewings are falcate apically, with a slight angle in the centre of the distal margin.

The fringes are whitish between the apex and this angle.

Taxonomic note. Poole (1989) retained simillima Swinhoe (Burma, Andamans) as a good species, but it appears identical to falcata.

Geographical range. India, Nepal, Burma, Thailand (VK), Andamans, Borneo, Bali, Sulawesi.

Habitat preference. This is an infrequent species of lowland forest, possibly favouring alluvial or riverine forest, and has not been recorded from above 200m.

Biology. The species was reared in India by Bell (MS). The larva was described as a rather flattened, euteliine type at A5-A6, but with prolegs on A4 half size and those on A3 considerably reduced. The body is stoutest in the region of the fully developed prolegs, but tapers most strongly over the thoracic segments. The head is yellowish white, shaded pink. The body has thin, transparent skin that is very light green with a light indigo dorsal line and an indistinct yellow spiracular one. Each segment has a pinkish suffusion of transverse lines from a more definite spiracular patch. The spiracles are light orange.

The whitish, threadlike first instar larvae coincide with bud-burst of the host plant in the Indian monsoon, and feed on the developing foliage which is red initially. The larvae rest on veins or within folds of these leaves. Pupation is on or near the ground in a loose, ovoid cell that incorporates particles of earth or detritus. The pupa lacks a bloom.

The host plant is
Hymenodictyon (Rubiaceae).

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